Torricelli's Principle
A tank with a circular hole of diameter d and at a depth h discharges water at a rate of Q.
The discharge rate is derived from Torricelli’s Principle and given by:
where
Q =discharge rate (m³/s)
h =depth of water (m)
A =area of opening (m²)
g =acceleration due to gravity (9.81 m/s²)